hmm... Volcanic activity peaks during every Solar Max cycle! This is something I observed as a teen, I even wrote a paper on it back when I was a kid in my AP 101 Astronomy class. Next thing you know someone wrote a paper in 2003 about it and NASA makes reference to it. Solar Storms influence geological activity and climate. If you dig around and research the historical volcanic eruptions, earthquakes, hurricanes, typhoons.. they all have something in common. They occured during a solar max cycle.